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Licensed Unlicensed Requires Authentication Published by De Gruyter November 29, 2018

Synthesis of Ni/YSZ based anode and investigation of effect of PVA as pore-former upon porosity, microstructure and thermal behavior for potential use in solid oxide fuel cells (SOFCs)

Mariah Batool , Maria Sattar , Ussama K. Barki and Zuhair S. Khan

Abstract

This study focuses on development of Nickel–Yttira Stabilized Zirconia (Ni/YSZ) based anode material by solid-state synthesis using polyvinyl alcohol (PVA) in varying weight concentrations (3 wt.% and 6 wt.%) both as a binder and as a pore-former. Scanning electron microscopy and X-ray diffraction based structural and morphological analyses were performed and the synthesis of a homogeneous NiO/YSZ phase was confirmed after sintering at 1 000 °C. Microscopic study investigating effects of PVA concentration upon pore density in pellets pressed under the same conditions was conducted. Thermo-gravimetric/differential thermal analysis of the powders pre-dried at around 120 °C was carried out up to 1 000 °C to investigate the phase change and the thermal decomposition behavior. Findings on reduction of NiO/YSZ in a mixed atmosphere of H2/Ar at 550 °C are also discussed in detail. The results demonstrated that areal porosity of 12 % and 24 % was achieved with 3 wt.% and 6 wt.% of PVA, respectively.


*Correspondence address, Dr. Zuhair S. Khan, U.S. Pakistan Center for Advanced Studies in Energy (USPCAS-E), National University of Sciences & Technology (NUST), Islamabad, 44000, Pakistan, Tel.: +92-51-90855276, E-mail:
** Ms. Mariah Batool, U.S. Pakistan Center for Advanced Studies in Energy (USPCAS-E), National University of Sciences & Technology (NUST), Islamabad, 44000, Pakistan, Tel.: +92-333-4710896, E-mail: ,

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Received: 2017-11-29
Accepted: 2018-07-20
Published Online: 2018-11-29
Published in Print: 2018-12-10

© 2018, Carl Hanser Verlag, München

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